A fiber spinning machine and a fiber manufacturing method

Abstract

The application relates to a fiber spinning machine and a fiber manufacturing method, which comprises a base, a spinning barrel connected to the base through a motor rotation, a conductive layer on the inner wall of the spinning barrel, which is conducted by a conductive medium and a capacitive medium, a connecting sheet arranged in an array at the bottom of the spinning barrel, which is conducted by the conductive medium and the capacitive medium respectively, a negative electrode contact and a positive electrode contact arranged in a ring on the base, the contact and the connecting sheet are connected to each other through the rotation of the spinning barrel, the surface of the spinning barrel is spaced apart to show a negative electrode and a positive electrode, the potential interval is eliminated through the reciprocating capacitive medium, and the spinning control is realized; the array ordered spinning of the spinning is realized through the spinning barrel rotating at a high speed and cooperating with the array arranged fiber injection needle; compared with the swing type spinning of the single fiber injection needle in the prior art, the spinning of the structure is more uniform, and the uniform spinning can be realized by only dynamically controlling the charge polarity on the spinning barrel.

Description

Technical Field

[0001] This invention relates to the field of electrospinning, and more particularly to an apparatus and method for preparing mass-produced oriented fiber membranes based on electrospinning. Background Technology

[0002] Electrospinning technology was first described in Formhals' patent US1975504, published in 1934. It is a technique for processing polymers in a molten or solution state under a high-voltage electric field at a tip into fibers or powders. Due to the strong electrostatic force at the tip, the fluid is rapidly stretched and solidified, and the resulting fibers or powders are typically in the micrometer to nanometer range. Depending on the polymer and environmental parameters, single fibers, composite materials, and ultrafine continuous fibers with varying planar and spatial structures, ranging from micrometer to nanometer diameters, can be prepared to achieve different applications. Since the 21st century, the preparation of conductive polymer nanofibers using electrospinning technology has received continuous attention from researchers and has been successfully applied.

[0003] Existing spinning equipment uses a spinning drum and movable spinning fiber nozzles to achieve directional spinning. Because the oscillation speed of the spinning fiber nozzles is limited, it is easy for the spinning fibers to accumulate locally on the inner wall of the spinning drum, or for the spinning to be too thick in some areas and too sparse in others. This will eventually affect the uniformity of spinning and the uniformity of the filter hole spacing density, thus affecting product quality. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention aims to provide an apparatus and method for preparing mass-produced oriented fiber membranes.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A fiber spinning machine, comprising:

[0007] The base has a main rotating output shaft of the driver on its upper part. A discharge power supply ring is set on the upper part of the base, coaxial with the main rotating output shaft. Several negative circuit contacts and several positive circuit contacts are arranged in a ring array on the discharge power supply ring, with the negative circuit contacts and positive circuit contacts arranged alternately.

[0008] The spinning drum is rotatably connected to the upper part of the base via a main rotating output shaft; a fiber receiving layer with an annular structure and a cylindrical structure is provided on the inner wall of the spinning drum.

[0009] The electrostatic discharge assembly includes a power receiving ring disposed at the bottom of the spinning drum, which is pressed and conductively connected to the discharge power supply ring. The power receiving ring has a ring array of several negative loop connecting pieces and several positive loop connecting pieces, which are arranged alternately. The electrostatic discharge assembly also includes a ring array of several capacitor dielectrics and several conductive dielectrics arranged alternately within the wall of the spinning drum. One end of the capacitor dielectric is connected to a positive loop connecting piece, and one end of the conductive dielectric is connected to a negative loop connecting piece. The electrostatic discharge assembly further includes a ring array of several conductive layers disposed in a ring array within the inner wall of the spinning drum. The conductive layers are insulated from each other by insulating blocks, and each conductive layer is connected to a corresponding capacitor dielectric or conductive dielectric through a conductive sheet.

[0010] The hanger is suspended and mounted inside the spinning drum by a robotic arm mechanism at its top. The middle part of the hanger includes a support tube, on which several spinnerets, electrode assemblies and discharge electrode assemblies are arranged in an array.

[0011] The spinneret assembly includes an annular spinneret frame fixed to the outer wall of a support tube. An annular liquid supply chamber is provided inside the spinneret frame. Conductor tubes for supplying fiber liquid to the liquid supply chamber are arranged in an array inside the support tube. The conductor tubes are connected to the fiber liquid supply assembly through connecting tubes. A plurality of fiber needles for ejecting fiber liquid are arranged in an annular array on the side wall of the spinneret frame. The fiber needles are in communication with the liquid supply chamber and extend toward the inner wall of the spinning drum.

[0012] The fiber liquid supply assembly includes several fiber liquid pumps. The outlet of each fiber liquid pump is connected to each guide pipe through a connecting pipe. The fiber liquid pump supplies liquid to the supply chamber connected to the corresponding guide pipe.

[0013] The electrode assembly discharges an electrode assembly, which includes a second discharge plate fixed to one side wall of the nozzle holder. The periphery of the second discharge plate extends toward the fiber nozzle and makes conductive contact with the fiber nozzle. The electrode assembly discharges an electrode assembly, which also includes a first discharge plate. The first discharge plate is fixed to the support tube and located below the nozzle holder by an array of insulating rings disposed on the inner edge of the first discharge plate. The outer diameter of the first discharge plate is smaller than the outer diameter of the nozzle holder.

[0014] And, an electrostatic power supply assembly, the electrostatic power supply assembly including a spinning discharge circuit and a commutation discharge circuit, the spinning discharge circuit including a spinning discharge power supply, the commutation discharge circuit including a commutation discharge power supply; wherein the negative terminal of the spinning discharge power supply is connected to each negative circuit contact of the discharge power supply ring through a shunt, and the positive terminal of the spinning discharge power supply is connected to each second discharge plate through a shunt; the negative terminal of the commutation discharge circuit is connected to each first discharge plate through a shunt, and the positive terminal of the commutation discharge circuit is connected to each positive circuit contact of the discharge power supply ring through a shunt.

[0015] As a further improvement of the present invention, a supporting base plate is fixed on the base by a connecting column, and a protective barrel is provided around the supporting base plate. A limiting ring is provided at the top of the protective barrel, and a top sliding support ring is provided on the limiting ring, which is embedded between the inner wall of the protective barrel and the outer wall of the spinning barrel. A bottom sliding support ring is provided around the supporting base plate, which is also embedded between the inner wall of the protective barrel and the outer wall of the spinning barrel. The top and bottom sliding support rings are made of nylon, and the inner rings of the top and bottom sliding support rings contact the outer walls of the axial ends of the spinning barrel. The sliding support rings can provide additional rotational support for the rotation of the spinning barrel, ensuring the stability of the spinning barrel during rotation and reducing the vibration of the spinning barrel caused by its own oscillation when rotating at high speed. While ensuring the rotational stability of the spinning barrel, it can also ensure the tight contact between the power supply ring and the power discharge ring.

[0016] As a further improvement of the present invention, the nozzle holder includes a support plate fixed to the wall of the support tube. A support frame is fixed below the support plate by a ring array of tension bolts. The fiber nozzles are vertically fixed to the side wall of the support frame. The support plate and the support frame form a liquid supply chamber. Both the support plate and the support frame are made of nylon or polyoxymethylene. The polyoxymethylene support plate has good electrical insulation and acid, alkali and high temperature resistance, which can ensure the stability of the fiber liquid in the liquid supply chamber and reduce the impact of the high voltage electrode on the nozzle holder and even the fiber liquid supply equipment.

[0017] As a further improvement of the present invention, the second discharge plate is fixed to the support plate. The second discharge plate is fixed to the support plate by a tension bolt that passes through the bottom of the support frame and through the support plate. The tension bolt passes through the support plate and is fixed to the second discharge plate. This structure achieves power supply through the second discharge plate. The split electrode connection structure is easy to maintain. The tension bolt fixation is more stable and the disassembly and installation are also more convenient.

[0018] As a further improvement of the present invention, a pressure regulating cover is connected to the top of the hanger. Several floating springs are coaxially arrayed on the inner ring of the pressure regulating cover, and the floating springs are fixed to the hanger via their inner ring. A sealing brush for sliding and sealing contact with the inner wall of the spinning drum is fixed to the outer edge of the pressure regulating cover. Several exhaust holes are arrayed at the bottom of the pressure regulating cover. A spinning upper limit ring is connected to the bottom of the pressure regulating cover via several annularly arrayed hangers. A sliding gap is provided between the outer ring of the spinning upper limit ring and the inner wall of the spinning drum. A spinning lower limit ring is connected to the bottom of the spinning drum via a support platform. The pressure regulating cover can reduce the influence of external airflow on the spinning process, and can also conveniently discharge the hot air and heat generated by the heating and expansion of the high-temperature fiber liquid. The limit ring structure can restrict the spinning range and reduce the overflow of spun fibers from the spinning drum.

[0019] As a further improvement of the present invention, the hanger includes an outer support tube, the top end of which is provided with a connecting seat for connecting to a robotic arm. An upper support tube is coaxially fixedly connected inside the outer support tube. The lower end of the upper support tube is connected to a lower support tube through a spherical compensator. The spinneret assembly, electrode assembly, and discharge electrode assembly are fixed on the lower support tube. A side support tube is connected through the side wall of the outer support tube. The side support tube passes through the outer support tube and communicates with the top side wall of the upper support tube. A connecting tube passes through the side support tube and enters the upper support tube. The spherical compensator structure enables dynamic separation of the liquid inlet and outlet pipes, which can not only reduce the impact of liquid supply vibration on the fiber nozzles, but also reduce the impact of vibration of the upper pressure regulating cover caused by the rotation of the spinning drum on the fiber nozzles.

[0020] As a further improvement of the present invention, a transition cover is connected to the bottom of the outer support tube. Several hydraulic damping cylinders are connected in a ring array to the inner wall of the transition cover via a transition plate. A support plate is fixed on the top of the lower support tube. The front end of the hydraulic damping cylinder is movably connected to the support plate via several stainless steel elastic connecting rods. The hydraulic damping cylinder can provide a certain vibration damping to achieve vibration reduction of low-speed vibration. The elastic connecting rod has high vibration damping sensitivity and small cross-sectional area. While providing support, it can minimize the transmission efficiency of vibration. At the same time, the energy of high-speed vibration can be consumed through the vibration of the elastic connecting rod itself.

[0021] As a further improvement of the present invention, the pressure regulating cover includes an annular pressure regulating groove, with an exhaust port arranged at the bottom of the pressure regulating groove. An annular filter plate made of non-woven cotton cloth is coaxially fixed inside the pressure regulating groove. A perforated protective plate is coaxially arranged above the filter plate inside the pressure regulating groove. Several turbulence plates are arranged in annular array at the bottom of the pressure regulating cover. The turbulence plates are arranged along the radial axis of the pressure regulating cover, with their tips extending towards the inner wall of the spinning drum. The pressure regulating groove can provide a certain expansion range for the rapidly expanding hot air, eliminating the situation where the expanding hot air directly impacts the pressure regulating cover, causing the cover to vibrate. The filter screen can filter air with impurities drawn in from the outside when the air cools and contracts, thus affecting the quality of the filter screen. The turbulence plates can prevent the formation of a constant airflow layer on the surface of the high-speed rotating spinning drum, preventing the constant airflow from impacting the spinning process, causing the spinning to break or preventing the spinning from adhering to the surface of the spinning drum due to the obstruction of the airflow layer.

[0022] As a further improvement of the present invention, a plurality of inlay grooves coaxial with the axis of the spinning drum are arranged in a ring array on the outer side of the spinning drum, and the capacitor dielectric and the conductive dielectric are fixed in each inlay groove at intervals by insulating glue.

[0023] A method for manufacturing fibers using a fiber spinning machine includes the following steps:

[0024] The spinning preparation process includes:

[0025] Step 1, Spinning preparation, fiber solution preparation process: Weigh 18 grams of PLLA, the molecular weight of PLLA is 200,000 Daltons, and dissolve it in 300 ml of a mixed solvent of CH2Cl2 and DMF. The volume ratio of CH2Cl2 to DMF is 1:9, and a PLLA solution with a mass-volume concentration of 6 g / mL is finally obtained. Seal the solution with sealing film and stir magnetically for 5 hours until the solution is homogeneous and transparent. Set aside for use.

[0026] Step 2, spinning preparation, fiber nozzle positioning process: The control module controls the robotic arm mechanism to adjust the fixed position of the fiber nozzle array so that the center of the fiber nozzle array coincides with the center of the fiber receiving layer, and at the same time, the fiber nozzle array area is aligned with the fiber receiving layer area.

[0027] Step 3, Spinning Preparation and Spinning Parameter Settings: The fiber liquid pump is a precision injection pump, including several arrayed syringes. The precision injection pump pushes the fiber liquid out, adding it into the syringe's storage space. Take 250ml of the solution obtained in Step 1 and inject it evenly into each syringe of the fiber liquid pump. The operation control module sets the working speed of the fiber liquid pump, adjusting the inlet rate of each pump to the supply chamber to 20ml / h. The operation control module sets the rotary drive motor to rotate the fiber receiving layer relative to the fiber nozzle array at 60rpm. The operation control module adjusts the robotic arm mechanism to ensure the vertical distance between the fiber nozzle tip and the surface of the fiber receiving layer is 15cm. The operation control module turns on the electrostatic power supply component, ensuring the voltage of the spinning discharge power supply and the commutation discharge power supply is 20kV. Simultaneously, it checks whether the current value of the spinning discharge power supply and the commutation discharge power supply is 0mA to ensure no leakage. The control module then starts the fiber liquid pump and rotary drive mechanism to begin spinning.

[0028] Spinning process:

[0029] The first step involves arranging the spinning drum. A capacitor and a conductive medium are arranged in an array at intervals on the outer wall of the spinning drum of the fiber spinning machine. A long, strip-shaped conductive layer is arranged in an array on the inner wall of the spinning drum, along the axis of the spinning drum. The conductive layer is sequentially connected to the capacitor and the conductive medium. A power receiving ring is installed at the bottom of the spinning drum, and this ring is arrayed with positive and negative circuit connecting pieces for connecting the capacitor and the conductive medium, respectively. A discharge power supply ring is installed on the rotating support of the spinning drum, and this ring has a circular array of several negative and positive circuit contacts, spaced apart from each other. The power receiving ring and the discharge power supply ring are then brought into contact.

[0030] The second step involves arranging the fiber nozzles. Several fiber nozzle arrays are suspended and fixed in the middle of the spinning drum of the fiber spinning machine via support pipes. Each fiber nozzle array is connected to the fiber liquid via the support pipes. Several fiber nozzles arranged in a ring are set on each fiber nozzle array. The fiber nozzles are supplied with liquid through a fiber liquid supply device. A second discharge plate is set on the fiber nozzle array, and the outer edge of the second discharge plate is in conductive contact with the fiber nozzles.

[0031] The third step is the arrangement of the first discharge plate, where a first discharge plate is placed between two adjacent fiber nozzle arrays; the fourth step is the arrangement of the electrostatic power supply assembly, which includes a spinning discharge circuit and a commutation discharge circuit. The spinning discharge circuit includes a spinning discharge power supply, and the commutation discharge circuit includes a commutation discharge power supply. The negative terminal of the spinning discharge power supply is connected to each negative circuit contact of the discharge power supply ring through a splitter, and the positive terminal of the spinning discharge power supply is connected to each second discharge plate through a splitter. The negative terminal of the commutation discharge circuit is connected to each first discharge plate through a splitter, and the positive terminal of the commutation discharge circuit is connected to each positive circuit contact of the discharge power supply ring through a splitter.

[0032] The fifth step is to drive the spinning drum. A rotary drive motor is installed on the rotating support of the spinning drum to drive the spinning drum to rotate.

[0033] The sixth step is the release of the fiber liquid. The fiber liquid pump is a precision injection pump, which includes several arrayed syringes. The precision injection pump drives the injection pistons of each syringe to move, so that the fiber liquid inside the fiber liquid pump is delivered to the supply chamber. The fiber nozzles arranged in a ring on the supply chamber will squeeze out spinning droplets. The spinning droplets are pulled into fibers under the drive of the electrostatic field.

[0034] Step 7, the spinning process: First, in step 1, the negative circuit contact is connected to the negative circuit connecting piece, and the positive circuit contact is connected to the positive circuit connecting piece. At this time, the spinning discharge circuit is connected. The conductive layer connected to the conductive medium is on the side with a lower potential, while the second discharge plate connected to the fiber nozzle is on the side with a higher potential. The charge moves along the electric field direction toward the local conductive layer, that is, toward the surface of the spinning drum. At this time, the capacitor dielectric connected in series in the commutation discharge circuit will be rapidly charged. After the capacitor dielectric is fully charged, the entire commutation discharge circuit will be in an open state. This results in no electric field between the conductive layer connected to the capacitor dielectric and the first discharge plate. The fiber liquid is not driven by the electric field of the commutation discharge circuit. The fibers formed by the solidification of the fiber liquid will first move towards the inner wall of the spinning drum. Then, the spinning drum continues to rotate. When the positive circuit connecting piece of the spinning drum is between the positive circuit contact and the negative circuit contact, the capacitor that has lost its potential will quickly discharge and empty. In step 2, the negative circuit contact and the positive circuit connecting piece are connected. At this time, the conductive dielectric is connected in series to the commutation discharge circuit, so that the conductive layer connected to the conductive dielectric will be in the commutation discharge circuit. As the discharge circuit moves towards the side with the higher potential, while the first discharge plate is on the side with the lower potential, the charge moves along the electric field of the commutated discharge circuit. The cured fiber moves towards the first discharge plate with the lower potential along with the charge. At this time, the cured portion of the spun yarn that was moving towards the spinning drum will move back towards the center of the spinning drum. When moving towards the center, the yarn will bend due to bending. In step 2, the capacitor dielectric is connected in series in the spinning discharge circuit. After the capacitor dielectric is fully charged, the spinning discharge circuit is disconnected, and the spinning discharge circuit can no longer generate an electric field. Then, the spinning drum continues to rotate. The capacitor continues to discharge. Then, in step 3, the electrode state of the spinning drum returns to the state of step 1. The filaments move back to the surface of the spinning drum under the drive of the electric field of the spinning discharge circuit. This process is repeated several times. Through the repetition of steps 1 to 2, the filaments are bent by the repeated folding of the spinning drum surface during the spinning drum rotation. This causes the filaments to adhere to the surface of the spinning drum in a partially bent state, and finally a fiber membrane made of twisted filaments is obtained. The fiber membrane is removed from the fiber receiving layer, cut and dried to obtain the final product.

[0035] The beneficial effects of this invention are:

[0036] 1. This invention achieves array-order spinning by using a rapidly rotating spinning drum in conjunction with an array of fiber liquid jet pipes. Compared with the oscillating spinning of single fiber nozzles in the prior art, this structure produces more uniform spinning. Uniform spinning can be achieved simply by dynamically controlling the negative electrode on the spinning drum.

[0037] 2. This invention achieves repeated, spaced electrode control on the inner wall of the spinning drum by rotating and reciprocating negative and positive electrodes. This allows the electrostatically charged spinning to bend under the drive of the electrodes inside the spinning drum. The bent spinning threads, through stacking, can have a more uniform stacking density compared to straight-drawn spinning threads, thus ensuring the uniformity of the filter pores on the filter screen or filter membrane. At the same time, the bent spinning can provide the filter membrane or filter screen with greater elasticity, making it less prone to damage due to local bending or excessive stretching of the spinning threads. Attached Figure Description

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0039] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0040] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0041] Figure 3 yes Figure 1 A magnified view of a section at point B in the middle;

[0042] Figure 4 yes Figure 1 Enlarged view of part C in the middle

[0043] Figure 5 This is a cross-sectional schematic diagram of the spinning drum;

[0044] Figure 6 This is a schematic diagram of the discharge power supply ring;

[0045] Figure 7 This is a schematic diagram of the pressure regulating cover.

[0046] Figure 8 This is a schematic diagram of the spinning state in step 1;

[0047] Figure 9 This is a schematic diagram of the spinning state in step 2;

[0048] Figure 10 This is a schematic diagram of the spinning state in step 3;

[0049] Figure 11 This is a schematic diagram of the spinning state in step 4;

[0050] Figure 12 This is a schematic diagram of the spinning state in step 5.

[0051] In the diagram: 1. Base; 2. Main rotary output shaft; 3. Rotary drive motor; 4. Connecting column; 5. Support base plate; 6. Discharge power supply ring; 7. Power receiving power supply ring; 8. Spinning barrel; 9. Embedding groove; 10. Conductive medium; 11. Inner wall of spinning barrel; 12. Top sliding support ring; 13. Protective barrel; 14. Spinning upper limit ring; 15. Hanging rod; 16. Limiting ring; 17. Connecting seat; 18. Outer support tube; 19. Side support tube; 20. Support upper tube; 21. Clamping ring; 22. Floating spring; 23. Adapter cover; 24. Inner positioning sleeve; 25. Pressure regulating cover; 26. Protective plate; 27. Pressure regulating groove; 28. Exhaust. 29. Hole; 30. Filter plate; 31. Baffle plate; 32. Adapter plate; 33. Hydraulic shock absorber; 34. Elastic connecting rod; 35. Spherical compensator; 36. Support plate; 37. Clamping sleeve; 38. Support plate; 39. Support frame; 40. Second discharge plate; 41. Conductor tube; 42. Fiber nozzle; 43. Insulating ring; 44. First discharge plate; 45. Support lower tube; 46. End inspection cover; 47. Electric heating tube; 48. Capacitor dielectric; 49. Insulating spacer block; 50. Conductive sheet; 51. Conductive layer; 52. Spinning layer; 53. Negative circuit contact; 54. Positive circuit contact; 55. Liquid supply chamber; 56. Thread. Detailed Implementation

[0052] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0053] A fiber spinning machine, such as Figure 1 The bottom of the spinning drum is a base with several connecting columns arranged in a circular array on the base. A rotary drive motor is embedded in the middle of the base, and the main rotary output shaft of the rotary drive motor is used to drive the entire spinning drum to rotate. A support base plate is fixed on the upper part of the base through the connecting columns. A protective barrel is vertically fixed on the periphery of the support base plate. The inner wall of the protective barrel is used to slide and support the spinning drum. A limiting ring is fixed at the top of the protective barrel. A top sliding support ring is fixed at the position of the protective barrel corresponding to the limiting ring. A bottom sliding support ring is fixed at the position of the protective barrel corresponding to the support base plate. The top sliding support ring and the bottom sliding support ring provide sliding support for the top and bottom of the spinning drum, respectively.

[0054] like Figure 6A discharge power supply ring for power supply and bottom support is also provided on the supporting base plate. Corresponding to the discharge power supply ring, a receiving power supply ring is coaxially fixed at the bottom of the spinning drum. Both the discharge power supply ring and the receiving power supply ring are made of nylon or polyoxymethylene to ensure their wear resistance and hardness. Several negative circuit contacts and several positive circuit contacts are arranged in an array at intervals on the discharge power supply ring. The negative circuit contacts and positive circuit contacts adopt a ball contact structure. Several negative circuit connecting pieces and several positive circuit connecting pieces are arranged in an array at intervals on the receiving power supply ring. The negative circuit connecting pieces and positive circuit connecting pieces are used to contact the negative circuit contacts and positive circuit contacts. This allows the negative circuit connecting pieces and positive circuit connecting pieces, as well as the negative circuit contacts and positive circuit contacts, to contact each other when the receiving power supply ring and the discharge power supply ring slide relative to each other, thereby realizing power supply control.

[0055] like Figure 5 On the outer side of the spinning drum, several inlay grooves coaxial with the axis of the spinning drum are arranged in a ring array. Through the inlay grooves, several capacitor dielectrics and conductive dielectrics are arranged in a ring array on the outer wall of the spinning drum. The capacitor dielectrics are made of elongated capacitors, and the conductive dielectrics are made of stainless steel sheets. The capacitor dielectrics and conductive dielectrics are fixed in each inlay groove with insulating glue at intervals. On the inner wall of the spinning drum, several elongated conductive layers are arranged in a ring array. Each conductive layer is connected to the capacitor dielectric and conductive dielectric through conductive sheets embedded in the spinning drum. At the same time, several elongated insulating spacers are arranged in a ring array at intervals on the inner wall of the spinning drum. Adjacent conductive layers are insulated and separated by insulating spacers made of insulating material. The insulating spacers are integrally injection molded structures.

[0056] like Figure 1 and Figure 7 A pressure regulating cover is connected to the top of the spinning drum via a hanger. The inner ring of the pressure regulating cover has a linear array of floating springs, the inner ring of which is fixed to a clamping ring, which is then fitted and fixed to the hanger. The outer ring of the pressure regulating cover slides and seals against the inner wall of the spinning drum via a sealing brush. The pressure regulating cover includes an annular pressure regulating groove, the bottom of which has an array of exhaust holes. An annular filter plate, made of non-woven cotton fabric, is coaxially fixed inside the pressure regulating groove. A perforated protective plate is coaxially positioned above the filter plate inside the pressure regulating groove. The filter plate prevents spinning debris from entering the outside air, while the protective plate prevents the filter plate from bulging or cracking and detaching due to excessive air pressure expansion, thus ensuring safety.

[0057] like Figure 1 and Figure 7 Several turbulence plates are arranged in a ring array at the bottom of the pressure regulating cover. The turbulence plates are arranged along the radial axis of the pressure regulating cover, and the tips of the turbulence plates extend toward the inner wall of the spinning barrel.

[0058] like Figure 1 and Figure 2 The hanger includes an outer support tube with a connector at its top for connection to a robotic arm. Inside the outer support tube, an upper support tube is coaxially fixed via a sponge-material inner positioning sleeve. The lower end of the upper support tube is connected to a lower support tube via a ball joint compensator. The spinneret assembly and electrode assembly are fixed to the lower support tube. A side support tube passes through the side wall of the outer support tube and communicates with the top side wall of the upper support tube. The side support tube connects to a fiber fluid delivery device, which includes a fiber fluid pump (a medical syringe pump). Each fiber fluid pump is independently connected to its corresponding supply chamber via a connecting pipe. The connecting pipes of the fiber liquid pump are bundled together and fixed to each other through an outer sleeve. The outer sleeve is fixed to the side support pipe. Each connecting pipe passes through the side support pipe and is connected to the guide pipe of each nozzle holder. The fiber liquid is delivered by driving the fiber liquid pump, and the fiber liquid flow rate is adjusted by adjusting the injection speed of the fiber liquid pump. A transition cover is also sleeved on the bottom of the outer support pipe. Several hydraulic shock absorbers are connected in a ring array through a transition plate on the inner wall of the transition cover. A support plate is fixed to the top outer wall of the lower support pipe through a clamping sleeve. The front end of the hydraulic shock absorber is movably connected to the support plate through several stainless steel elastic connecting rods. The aforementioned spherical compensator is located between the support plate and the transition plate.

[0059] like Figure 1 and Figure 3 A number of spinnerets are fixedly arranged in an array on the lower support tube. Each spinneret includes a spinneret holder, with fiber spinnerets arranged in a ring array on the side wall of the spinneret holder. The spinneret holder includes a support plate fixed to the wall of the support tube. A support frame is fixed below the support plate by tension bolts arranged in a ring array. The fiber spinnerets are vertically fixed to the side wall of the support frame. A liquid supply chamber is formed between the support plate and the support frame. A number of guide tubes are arranged in a ring array on the lower support tube corresponding to the positions of each spinneret. The inner wall of the liquid supply chamber is connected to the lower support tube through the guide tubes. At the same time, a second discharge plate is fixed at the top of the spinneret holder by the support plate. The outer ring of the second discharge plate is bent downward and contacts each fiber spinneret.

[0060] like Figure 4 An end inspection cover is also provided at the bottom of the supporting tube. An electric heating tube is vertically fixed in the middle of the end inspection cover. The electric heating tube is used to contact the connecting tube and heat the fiber liquid inside the connecting tube.

[0061] like Figure 1 and Figure 3 A first discharge plate is connected to each corresponding nozzle holder below by an insulating ring. The insulating ring is sleeved on the outer wall of the lower support tube and is glued and fixed thereto.

[0062] Finally, the entire system is powered by an electrostatic power supply component that provides a potential difference, allowing the spun fibers to move in an electric field with this potential difference. The electrostatic power supply component includes a spinning discharge circuit and a commutation discharge circuit. The spinning discharge circuit includes a spinning discharge power supply, and the commutation discharge circuit includes a commutation discharge power supply. The negative terminal of the spinning discharge power supply is connected to each negative circuit contact of the discharge power supply ring via a shunt, and the positive terminal of the spinning discharge power supply is connected to each second discharge plate via a shunt. The negative terminal of the commutation discharge circuit is connected to each first discharge plate via a shunt, and the positive terminal of the commutation discharge circuit is connected to each positive circuit contact of the discharge power supply ring via a shunt.

[0063] The system of this institution includes a main control module, which is used to control the electrostatic power supply components, the rotary drive motor of the robotic arm mechanism, and the fiber liquid pump. The control module controls the voltage and switch of the spinning discharge power supply and the ring discharge power supply through a voltage regulating mechanism, and controls the drive current of the rotary drive motor and the fiber liquid pump through a low-voltage current controller to adjust the speed of the rotary drive motor, the forward and reverse drive direction of the fiber liquid pump, the injection speed, etc.

[0064] The specific spinning method includes the following steps:

[0065] The first step is the arrangement of the spinning drums, such as... Figure 5 A capacitor dielectric and a conductive dielectric are arranged in an array at intervals on the outer wall of the spinning drum of a fiber spinning machine. An elongated conductive layer is arranged in an array on the inner wall of the spinning drum, along the axis of the spinning drum. The conductive layer is sequentially connected to the capacitor dielectric and the conductive dielectric. A power receiving ring is installed at the bottom of the spinning drum, and the power receiving ring array is equipped with positive and negative circuit connecting pieces for connecting the capacitor dielectric and the conductive dielectric, respectively. Figure 6 A discharge power supply ring is set on the rotating support of the spinning drum. Several negative circuit contacts and several positive circuit contacts are arranged in a ring array on the discharge power supply ring, with the negative circuit contacts and positive circuit contacts arranged at intervals. The power receiving ring is brought into contact with the discharge power supply ring.

[0066] The second step, as Figure 3 The fiber nozzles are arranged such that several fiber nozzle arrays are suspended and fixed in the middle of the spinning drum of the fiber spinning machine by a support pipe. Each fiber nozzle array is connected to the fiber liquid pump through a connecting pipe to realize the fiber liquid delivery. Several fiber nozzles are arranged in a ring array on each fiber nozzle array. A second discharge plate is set on the fiber nozzle array, and the outer edge of the second discharge plate is in conductive contact with the fiber nozzles.

[0067] The third step is the arrangement of the first discharge plate, where a first discharge plate is placed between two adjacent fiber nozzle arrays; the fourth step is as follows. Figure 3The electrostatic power supply assembly includes an electrostatic power supply, a spinning discharge circuit, and a commutation discharge circuit. The electrostatic power supply provides potential energy to the spinning discharge circuit and the commutation discharge circuit. The negative terminal of the spinning discharge circuit is connected in parallel to each negative circuit contact of the discharge power supply ring through a shunt, and the positive terminal of the spinning discharge circuit is connected in parallel to each second discharge plate through a shunt. At the same time, the negative terminal of the spinning discharge circuit is also connected to each first discharge plate through a step-down circuit. The positive terminal of the commutation discharge circuit is connected in parallel to each positive circuit contact of the discharge power supply ring through a shunt.

[0068] The fifth step is to drive the spinning drum. A rotary drive motor is installed on the rotating support of the spinning drum to drive the spinning drum to rotate.

[0069] The sixth step is the release of the fiber liquid. Gas is pressurized into the storage tank of the spinning liquid supply equipment to make the fiber liquid sprayed out evenly from the fiber nozzle.

[0070] Step 7: Spinning preparation process.

[0071] Preparation of cellulose solution: Weigh 18 grams of PLLA (molecular weight 200,000 Daltons), dissolve it in 300 ml of a mixed solvent of CH2Cl2 and DMF (volume ratio of CH2Cl2 to DMF 1:9), and finally obtain a PLLA solution with a mass-volume concentration of 6 g / mL. Seal the solution with sealing film and stir magnetically for 5 hours until the solution is homogeneous and transparent.

[0072] Positioning process of fiber nozzles: The control module controls the robotic arm mechanism to adjust the fixed position of the fiber nozzle array so that the center of the fiber nozzle array coincides with the center of the fiber receiving layer, and at the same time, the fiber nozzle array area is aligned with the fiber receiving layer area.

[0073] Setting spinning parameters: Add fiber liquid to the supply end of the fiber liquid pump and set the spinning parameters. Take 250ml of the solution obtained in step 1 and inject it into the liquid inlet module. Distribute the 250ml of solution injected into the liquid inlet module evenly into the storage chamber of the fiber liquid pump. Set the working speed of the fiber liquid pump in the operation control module and adjust the liquid inlet rate of each fiber liquid pump to 20ml / h. Set the rotary drive motor in the operation control module so that the rotation speed of the fiber receiving layer relative to the fiber nozzle array is 60rpm. Adjust the robotic arm mechanism in the operation control module so that the vertical distance between the end of the fiber nozzle and the surface of the fiber receiving layer is 15cm. Turn on the electrostatic power supply component in the operation control module so that the voltage of the spinning discharge power supply and the commutation discharge power supply is 20kV. At the same time, check whether the current value of the spinning discharge power supply and the commutation discharge power supply is 0mA to ensure no leakage. Start the fiber liquid pump and the rotary drive mechanism through the control module to start spinning.

[0074] Step 8, spinning process. First, step 1, as follows: Figure 8 The negative circuit contact is connected to the negative circuit connecting piece, and the positive circuit contact is connected to the positive circuit connecting piece. At this time, the spinning discharge circuit is connected. The conductive layer connected to the conductive medium is on the side with a lower potential, and the second discharge plate connected to the fiber nozzle is on the side with a higher potential. The charge moves along the direction of the electric field toward the local conductive layer, that is, toward the surface of the spinning drum. During this process, the spinning liquid will diverge under the traction of the electric field and move toward the local conductive layer on the surface of the spinning drum. At this time, the capacitor dielectric connected in series in the commutation discharge circuit will also be rapidly charged. After the capacitor dielectric is fully charged, the entire commutation discharge circuit will be in the open state. At this instant, there is no electric field between the conductive layer connected to the capacitor dielectric and the first discharge plate, and the fiber liquid will not be driven by the electric field of the commutation discharge circuit. Then, the spinning drum continues to rotate. When the positive circuit connecting piece of the spinning drum is in the position between the positive circuit contact and the negative circuit contact, the capacitor that has lost its potential will quickly discharge and be cleared. Step 2, as Figure 9 When the negative circuit contact is connected to the positive circuit connection piece, the conductive medium is connected in series to the commutation discharge circuit, so that the conductive layer connected to the conductive medium is on the side with a higher potential in the commutation discharge circuit, while the first discharge plate is on the side with a lower potential. The charge will move along the electric field of the commutation discharge circuit. During this process, the cured fiber will move towards the first discharge plate with a lower potential along with the charge. At this time, the cured part of the spun yarn that was moving towards the spinning drum will move back towards the center of the spinning drum. When moving towards the center, the spun yarn will bend due to bending. In step 2, the capacitor dielectric is connected in series to the spinning discharge circuit. After the capacitor dielectric is fully charged, the spinning discharge circuit is open, and the spinning discharge circuit cannot generate an electric field. At this moment, the fiber will stop diverging. Then, the spinning drum continues to rotate, the capacitor dielectric continues to discharge, and then, as Figure 10 In step 3, the electrode state of the spinning drum will return to the state of step 1, and the fiber will move back to the surface of the spinning drum under the drive of the electric field of the spinning discharge circuit; this process is repeated thereafter. Figure 11 Step 4, such as Figure 12 In step 5, by repeating the electric potential of several spinning drums from step 1 to step 2, the fiber is bent by the reciprocating folds on the surface of the spinning drum during the spinning drum rotation process. This causes the spun yarn to adhere to the surface of the spinning drum in a locally bent state, and finally obtains a fiber membrane made of twisted spun yarn.

[0075] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A fiber spinning machine, characterized in that, include: The base has a main rotating output shaft of the driver on its upper part. A discharge power supply ring is coaxially arranged on the upper part of the base with the main rotating output shaft. Several negative circuit contacts and several positive circuit contacts are arranged in a ring array on the discharge power supply ring, with the negative circuit contacts and positive circuit contacts arranged at intervals. The spinning drum is rotatably connected to the upper part of the base via a main rotating output shaft; a ring-shaped fiber receiving layer is provided on the inner wall of the spinning drum. The electrostatic discharge assembly includes a power receiving ring disposed at the bottom of the spinning drum, which is in conductive contact with a discharge power supply ring. The power receiving ring has a ring array of several negative loop connecting pieces and several positive loop connecting pieces, which are arranged alternately. The electrostatic discharge assembly also includes a ring array of several capacitor dielectrics and several conductive dielectrics arranged alternately within the wall of the spinning drum. One end of the capacitor dielectric is connected to a positive loop connecting piece, and one end of the conductive dielectric is connected to a negative loop connecting piece. The electrostatic discharge assembly further includes a ring array of several conductive layers disposed in a ring array within the inner wall of the spinning drum. The conductive layers are insulated from each other by insulating blocks, and each conductive layer is connected to a corresponding capacitor dielectric or conductive dielectric through a conductive sheet. The top of the hanger is suspended and mounted inside the spinning drum by a robotic arm mechanism. The middle of the hanger includes a support tube, on which several spinnerets and discharge electrode assemblies are arranged in an array. The spinning assembly includes an annular nozzle frame fixed to the outer wall of a support tube, an annular liquid supply chamber inside the nozzle frame, and a series of guide tubes arranged in an array inside the support tube for supplying fiber liquid to the liquid supply chamber. The guide tubes are connected to the fiber liquid supply assembly via connecting tubes. A plurality of fiber nozzles for ejecting fibers are arranged in an annular array on the side wall of the nozzle frame. The fiber nozzles are in communication with the liquid supply chamber and extend toward the inner wall of the spinning drum. The fiber liquid supply assembly includes several fiber liquid pumps. The outlet of each fiber liquid pump is connected to each guide pipe through a connecting pipe. The fiber liquid pump supplies liquid to the supply chamber connected to the corresponding guide pipe. The discharge electrode assembly includes a second discharge plate, which is fixed to one side wall of the nozzle holder. The periphery of the second discharge plate extends toward the fiber nozzle and makes conductive contact with the fiber nozzle. The discharge electrode assembly also includes a first discharge plate, which is fixed to a support tube and located below the nozzle holder by an array of insulating rings disposed on the inner edge of the first discharge plate. The outer diameter of the first discharge plate is smaller than the outer diameter of the nozzle holder. And, an electrostatic power supply assembly, the electrostatic power supply assembly including a spinning discharge circuit and a commutation discharge circuit, the spinning discharge circuit including a spinning discharge power supply, the commutation discharge circuit including a commutation discharge power supply; wherein the negative terminal of the spinning discharge power supply is connected to each negative circuit contact of the discharge power supply ring through a shunt, and the positive terminal of the spinning discharge power supply is connected to each second discharge plate through a shunt; the negative terminal of the commutation discharge circuit is connected to each first discharge plate through a shunt, and the positive terminal of the commutation discharge circuit is connected to each positive circuit contact of the discharge power supply ring through a shunt.

2. The fiber spinning machine as described in claim 1, characterized in that: A supporting base plate is fixed to the base via connecting columns. A protective barrel is provided around the supporting base plate. A limiting ring is provided at the top of the protective barrel. A top sliding support ring is provided on the limiting ring and embedded between the inner wall of the protective barrel and the outer wall of the spinning barrel. A bottom sliding support ring is provided around the supporting base plate and embedded between the inner wall of the protective barrel and the outer wall of the spinning barrel. The top and bottom sliding support rings are made of nylon, and the inner rings of the top and bottom sliding support rings are in contact with the outer walls of the axial ends of the spinning barrel.

3. The fiber spinning machine as described in claim 1, characterized in that: The nozzle holder includes a support plate fixed to the wall of the support tube. Below the support plate, a support frame is fixed by a ring array of tension bolts. The fiber nozzles are vertically fixed to the side wall of the support frame. The support plate and the support frame form a liquid supply chamber. Both the support plate and the support frame are made of nylon or polyoxymethylene.

4. A fiber spinning machine as described in claim 3, characterized in that: The second discharge plate is fixed to the support plate by tension bolts that pass through the bottom of the support frame and through the support plate.

5. A fiber spinning machine as described in claim 1, characterized in that: A pressure regulating cover is connected to the top of the hanger. Several floating springs are arranged coaxially on the inner ring of the pressure regulating cover. The floating springs are fixed to the hanger through their inner ring. A sealing brush for sliding and sealing contact with the inner wall of the spinning drum is fixed on the outer ring of the pressure regulating cover. Several vent holes are arranged in an array at the bottom of the pressure regulating cover. A spinning upper limit ring is connected to the bottom of the pressure regulating cover through several hanging rods arranged in a ring array. A sliding gap is provided between the outer ring of the spinning upper limit ring and the inner wall of the spinning drum. A spinning lower limit ring is connected to the bottom of the spinning drum through a support platform.

6. A fiber spinning machine as described in claim 5, characterized in that: The hanger includes an outer support tube with a connecting seat at its top for connecting to a robotic arm. An upper support tube is coaxially fixed inside the outer support tube. The lower end of the upper support tube is connected to a lower support tube via a ball compensator. The spinneret assembly and the discharge electrode assembly are fixed to the lower support tube. A side support tube is connected through the side wall of the outer support tube. The side support tube passes through the outer support tube and communicates with the top side wall of the upper support tube. A connecting tube passes through the side support tube and enters the upper support tube.

7. A fiber spinning machine as described in claim 6, characterized in that: in The bottom of the outer support tube is connected to a transition cover. Several hydraulic shock absorbers are connected in a ring array through a transition plate on the inner wall of the transition cover. A support plate is fixed on the top of the lower support tube. The front end of the hydraulic shock absorber is movably connected to the support plate through several elastic connecting rods made of stainless steel.

8. A fiber spinning machine as described in claim 5, characterized in that: The pressure regulating cover includes an annular pressure regulating groove, with an exhaust port arranged at the bottom of the pressure regulating groove. An annular filter plate made of non-woven cotton cloth is coaxially fixed inside the pressure regulating groove. A perforated protective plate is coaxially arranged above the filter plate inside the pressure regulating groove. Several turbulence deflectors are arranged in annular array at the bottom of the pressure regulating cover. The deflectors are arranged along the radial axis of the pressure regulating cover, and the tips of the deflectors extend toward the inner wall of the spinning barrel.

9. A fiber spinning machine as described in claim 1, characterized in that: Several inlay grooves, coaxial with the axis of the spinning drum, are arranged in a ring array on the outside of the spinning drum. The capacitor dielectric and the conductive dielectric are fixed in each inlay groove at intervals by insulating glue.

10. A method for manufacturing fibers using a fiber spinning machine, characterized by: Includes the following steps: The spinning preparation process includes: Step 1, Spinning preparation, fiber solution preparation process: Weigh 18 grams of PLLA, the molecular weight of PLLA is 200,000 Daltons, and dissolve it in 300 ml of a mixed solvent of CH2Cl2 and DMF. The volume ratio of CH2Cl2 to DMF is 1:9, and a PLLA solution with a mass-volume concentration of 6 g / mL is finally obtained. Seal the solution with sealing film and stir magnetically for 5 hours until the solution is homogeneous and transparent. Set aside for use. Step 2, spinning preparation, fiber nozzle positioning process: The control module controls the robotic arm mechanism to adjust the fixed position of the fiber nozzle array so that the center of the fiber nozzle array coincides with the center of the fiber receiving layer, and at the same time, the fiber nozzle array area is aligned with the fiber receiving layer area. Step 3, Spinning Preparation and Spinning Parameter Settings: The fiber liquid pump is a precision injection pump, including several arrayed syringes. The precision injection pump pushes the fiber liquid out, adding it into the syringe's storage space. Take 250ml of the solution obtained in Step 1 and inject it evenly into each syringe of the fiber liquid pump. The operation control module sets the working speed of the fiber liquid pump, adjusting the inlet rate of each pump to the supply chamber to 20ml / h. The operation control module sets the rotary drive motor to rotate the fiber receiving layer relative to the fiber nozzle array at 60rpm. The operation control module adjusts the robotic arm mechanism to ensure the vertical distance between the fiber nozzle tip and the surface of the fiber receiving layer is 15cm. The operation control module turns on the electrostatic power supply component, ensuring the voltage of the spinning discharge power supply and the commutation discharge power supply is 20kV. Simultaneously, it checks whether the current value of the spinning discharge power supply and the commutation discharge power supply is 0mA to ensure no leakage. The control module then starts the fiber liquid pump and the rotary drive mechanism to begin spinning. Spinning process: The first step involves arranging the spinning drum. A capacitor and a conductive medium are arranged in an array at intervals on the outer wall of the spinning drum of the fiber spinning machine. A long, strip-shaped conductive layer is arranged in an array on the inner wall of the spinning drum, along the axis of the spinning drum. The conductive layer is sequentially connected to the capacitor and the conductive medium. A power receiving ring is installed at the bottom of the spinning drum, and this ring is arrayed with positive and negative circuit connecting pieces for connecting the capacitor and the conductive medium, respectively. A discharge power supply ring is installed on the rotating support of the spinning drum, and this ring has a circular array of several negative and positive circuit contacts, spaced apart from each other. The power receiving ring and the discharge power supply ring are then brought into contact. The second step involves arranging the fiber nozzles. Several fiber nozzle arrays are suspended and fixed in the middle of the spinning drum of the fiber spinning machine via support pipes. Each fiber nozzle array is connected to the fiber liquid via the support pipes. Several fiber nozzles arranged in a ring are set on each fiber nozzle array. The fiber nozzles are supplied with liquid through a fiber liquid supply device. A second discharge plate is set on the fiber nozzle array, and the outer edge of the second discharge plate is in conductive contact with the fiber nozzles. The third step is the arrangement of the first discharge plate, which is placed between two adjacent fiber nozzle arrays. The fourth step is the arrangement of the electrostatic power supply components. The electrostatic power supply components include a spinning discharge circuit and a commutation discharge circuit. The spinning discharge circuit includes a spinning discharge power supply, and the commutation discharge circuit includes a commutation discharge power supply. The negative terminal of the spinning discharge power supply is connected to each negative circuit contact of the discharge power supply ring through a splitter, and the positive terminal of the spinning discharge power supply is connected to each second discharge plate through a splitter. The negative terminal of the commutation discharge circuit is connected to each first discharge plate through a splitter, and the positive terminal of the commutation discharge circuit is connected to each positive circuit contact of the discharge power supply ring through a splitter. The fifth step is to drive the spinning drum. A rotary drive motor is installed on the rotating support of the spinning drum to drive the spinning drum to rotate. The sixth step is the release of the fiber liquid. The fiber liquid pump is a precision injection pump, which includes several arrayed syringes. The precision injection pump drives the injection pistons of each syringe to move, so that the fiber liquid inside the fiber liquid pump is delivered to the supply chamber. The fiber nozzles arranged in a ring on the supply chamber will squeeze out spinning droplets. The spinning droplets are pulled into fibers under the drive of the electrostatic field. Step 7, the spinning process: First, in step 1, the negative circuit contact is connected to the negative circuit connecting piece, and the positive circuit contact is connected to the positive circuit connecting piece. At this time, the spinning discharge circuit is connected. The conductive layer connected to the conductive medium is on the side with a lower potential, while the second discharge plate connected to the fiber nozzle is on the side with a higher potential. The charge moves along the electric field direction toward the local conductive layer, that is, toward the surface of the spinning drum. At this time, the capacitor dielectric connected in series in the commutation discharge circuit will be rapidly charged. After the capacitor dielectric is fully charged, the entire commutation discharge circuit will be in an open state. This results in no electric field between the conductive layer connected to the capacitor dielectric and the first discharge plate. The fiber liquid is not driven by the electric field of the commutation discharge circuit. The fibers formed by the solidification of the fiber liquid will first move towards the inner wall of the spinning drum. Then, the spinning drum continues to rotate. When the positive circuit connecting piece of the spinning drum is between the positive circuit contact and the negative circuit contact, the capacitor that has lost its potential will quickly discharge and empty. In step 2, the negative circuit contact and the positive circuit connecting piece are connected. At this time, the conductive dielectric is connected in series to the commutation discharge circuit, so that the conductive layer connected to the conductive dielectric will be in the commutation discharge circuit. As the discharge circuit moves towards the side with the higher potential, while the first discharge plate is on the side with the lower potential, the charge moves along the electric field of the commutated discharge circuit. The cured fiber moves towards the first discharge plate with the lower potential along with the charge. At this time, the cured portion of the spun yarn that was moving towards the spinning drum will move back towards the center of the spinning drum. When moving towards the center, the yarn will bend due to bending. In step 2, the capacitor dielectric is connected in series in the spinning discharge circuit. After the capacitor dielectric is fully charged, the spinning discharge circuit is disconnected, and the spinning discharge circuit can no longer generate an electric field. Then, the spinning drum continues to rotate. The capacitor continues to discharge. Then, in step 3, the electrode state of the spinning drum returns to the state of step 1. The filaments move back to the surface of the spinning drum under the drive of the electric field of the spinning discharge circuit. This process is repeated several times. Through the repetition of steps 1 to 2, the filaments are bent by the repeated folding of the spinning drum surface during the spinning drum rotation. This causes the filaments to adhere to the surface of the spinning drum in a partially bent state, and finally a fiber membrane made of twisted filaments is obtained. The fiber membrane is removed from the fiber receiving layer, cut and dried to obtain the final product.

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